红色矿车底部轮轴特写

写实工业产品特写，一只暗红色长方形金属矿车或轨道车车斗的底部局部，金属表面有深红漆、磨损、划痕、锈斑和油污，车斗下缘呈直角，底部中央有红色凸出连接件和两根细支撑杆；下方为黑色横向车轴与转向架结构，左右各有一个大尺寸圆形实心钢轮，轮面灰黑、边缘磨损发白，轴心有凸起圆帽，中央轴段为加粗黑色圆柱形结构；纯白无缝背景，正面平视、紧凑横向构图，均匀柔和棚拍光，低反差，真实材质细节清晰，16:9画幅。

Realistic industrial product close-up of the underside of a dark red rectangular metal mine cart or rail cart body, with worn dark red paint, scratches, rust spots and grease stains, straight lower edge, a red protruding connector and two thin support rods underneath; below is a black transverse axle and bogie structure, with one large circular solid steel wheel on each side, gray-black wheel faces with worn and whitened edges, raised hub caps, and a thickened black cylindrical axle segment in the center; seamless pure white background, frontal eye-level view, compact horizontal composition, even soft studio lighting, low contrast, clear real material details, 16:9 aspect ratio.